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US 4,924,876 AGranted
Nasal breath monitor
OwnerPeter Cameroninventor
Life of this patent
Estimating the term…
Abstract
A nasal breath monitor, which uses separate sensors for each nostril to detect the flow of the breath, electronic circuitry to amplify and enhance the detected signal, and stereo headphones to bring this information to the ears.
Claims10
A device for monitoring the nasal breath which comprises:
- a. means for seperately sensing the flow of air through the two nostrils;
- and
- b. means for seperately amplifying the output of said means for sensing the flow of air;
- and
- c. means for making the said seperate amplified outputs sensible to the user, thereby providing an indication of relative airflow through the two nostrils.
2 more elements
A device for monitoring the nasal breath which comprises:
- a. two condensor electret microphones which seperately sense the flow of air through the two nostrils;
- and
- b. a differential amplifier, which amplifies the difference between the outputs of the two condensor electret microphones;
- and
- c. means for compression of the differentially amplified signal;
- and
- d. means for low-pass filtering of the compressed signal;
- and
- e. means for audio power amplification of the differentially amplified, compressed, and filtered signal;
- and
- f. headphones to make the said audio power amplified signal audible to the user.
8 more elements
A device for monitoring the nasal breath which comprises:
- a. two condensor electret microphones which seperately sense the flow of air through the two nostrils;
- and
- b. a third condensor electret microphone to provide an ambient reference;
- and
- c. differential amplifiers, which amplify the difference between the reference microphone and the microphones which sense the flows of air;
- and
- d. means for compression of the differentially amplified signals;
- and
- e. means for low-pass filtering of the compressed signals;
- and
- f. means for audio power amplification of the differentially amplified, compressed, and filtered signals;
- and
- g. stereo headphones to make the said audio power amplified signals audible to the user.
10 more elements
Dependencies are inferred from the claim text.